Door-closer



P. MIKKELSEN.

DOOR CLOSER.

APPLICATION FILED AUG-4, 1919.

Patented Feb. 17, 1920.

[N VE N TOR A/lnmeys UNITED srnrnsrnrnivr OFFICE.

PEDER MIKKELSEN, OF STAMFORD, CONNECTICUT, ASSIGNOR TO THE YALE & TOWN EMANUFACTURING COMPANY, OF STAMFORD, CONNECTICUT.

DOOR-CLOSER.

Specification of Letters Patent.

Patented Feb. 17, 1920.

To all whom it may concern:

Be it known that I, PEDER MIKKELsEN, a citizen of the United States, anda resident of Stamford, in'the county of Fairfield and State ofConnecticut, have in vented certain new and useful Improvements inDoor-Closers; and I do hereby declare the following to be a full, clear,and

exact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

My invention relates to improvements in that type of door closers havingmeans for normally holding a door in open position, and it consists inimproved means for releasing the door holding means in the event of afire so that the door will then automatically close and shut off thedraft and thus assist in confining the fire to the room in which itstarted.

In the accompanying drawings; Figure 1 is a view partly in section andpartly in side elevation of a door closer with my improvements appliedthereto and Fig. 2 is a bottom plan view of the same.

The improvement is designed for use with door closers or with combinedchecks and closers, hence I do not confine its application to either andby the term door closer, I intend to include combined checks andclosers.

5 represents the casing of a door closer, and 6 is the spindle to whichthe lever arm 7 is secured, the said lever arm being adapted forcooperation with the mechanism of the door closer and the door forclosing the latter in the usual and well known manner.

For the purpose of holding the door open the lever arm 7 is providedwith a spring pressed dog 8, and the cap of the closer 5 is providedwith an upwardly pro]ect1ng stop or rib 9, which is engaged by the lowerbeveled end of the dog 8 when the door is in open position, the dogriding over the stop during the opening movement of the door anddropping behind the same when the door is fully open, the pressure ofthe spring 11 bearing against the dog being sufficient under normalconditions'to prevent the latter from rising out of engagement with thestop, but not of course preventing the free manual operation of the dooreither in opening oi closing. The spring 11 bearing against the dogoperates to prevent the spring in the door closerfrom closing the doorwhen the dog is the spring holding the mal tension.

The dog 8 is mounted to move in the lever arm 7 and is provided with achisel or beveled lower end to engage the stop 9, and with a head 10which limits its downward movement and against which the free end of thelong flat spring 11 bears, the head of the dog being grooved to re ceivethe end of the spring which prevents the dog from turning in itsbearings. opposite end of the spring 11 is provided with a hole toreceive the end 12 yoke or support 13 which latter 1s b1fur cated asshown in Fig. 1, the two members thereof passing through holes in thelever arm and resting at their lower ends 011 the holding ring 14;. Thespring 11 may be secured to the yoke, or it may be loosely seated on thesame, the function of the yoke being to hold the spring in normalposition and under the tension imparted to it by the tension screw 15which passes through the lever arm 7 and spring 11 and is secured by anut. By adjusting the nut the tension of the spring can be increased ordiminished as may be necessary.

Passing through the lever arm between the holes in the latter for theside members of the yoke 13, is the screw 16 to the lower end of whichis screwed the taper headed sleeve 17 the head 18 of which forms a seatfor the fusible carrier 19. This carrier consists of two members made ofcomparatively thin metal, each disk shaped at one end and hook shaped atthe other enc, each disk and hook being connected by a neck. The hooks19 are reversely bent so as to interlock, as shown in Figs. 1 and 2, andthe disks overlap and are secured together by a readily fusible alloy orsolder, and when the parts are so assembled, the necks of the twomembers rest side by side and form a seat or carrier for the holdingring 1 1. The adjacent edges of the necks of the two members of thesupport 19 are cut away to form a circular open seat to receive andengage the taper head 18 of the sleeve 17, and when so secured formsunder normal conditions a solid unyielding seat for the ring 14 and alsothe yoke, so that normally the yoke forms an unyielding support for thespring 11 and is capable of withstanding any tension that may be appliedto the behind the stop and latter is under norvertically latter by It isevident end of the spring is removec the screw or bolt 15 and its nut,

however that instead of using a nut on the screw the latter may engagethreads in either the leverarm or the spring.

, With this construction it will be seen that when the spring 11 is putunder tension by the screw 15 itwill bear at one end against the dog 8and at the other end onthe yoke 13. As the yoke is supported by the ring1% resting on the fusible carrier, which in'turn is seated on thetapering head of sleeve 17, it will be seen that the pressure of thespring 11 on the yoke tends to separatethe two members'of the fusiblecarrier. The diskshaped ends of the fusible carrier are removed from thelever armand exposed on both sides to the temperature of the room, henceif the temperature rises abnormally, as in the case of a fire, it meltsthe alloy or solder thus permitting the pressure of the spring 11, whichpressure is indirectly borne bythe fusible carrier 19, to separate orspread the members of the latter and force them down on thetaperingsurfaces of the head of sleeve 17. This withdrawal of the support forthe yoke holding ring 14:, permitsthe yoke to settle down on the uppersurface of the lever arm and release the tension of the spring 11 on thedog 8, so that the latter will be free tobe forced up and over the stopby the spring (not shown) of the door closer, thus permitting the doorto close under the action. of the said door closer spring. f ,2 y

The tension bolt 15 should have a loose connection with the lever armorspring 11, or both, so that when the seat for the enter the spring willnot bind on the tension bolt or the latter will not bind in the leverarm, but'that the said parts will be free to moveto relieve the dog ofthe pressure of spring 11.

The head 18 of the sleeve 17 may beo'f greater diameter than the ring 1%so that after the separation of the member comprising the fusiblecarrier the-ring will settle down and be supported by the head, or thering mayhave an internal diameter that will permit it to drop away afterthe release of the fusible carrier, I

It is evident that many slight changes might be resorted to in therelative arrangement of parts shown and described without departingfromthe spirit. and scope of my invention. Hence I would have it'understood that I do not wish to confine myself to the exactconstruction and arrangement of parts'shown' and described, but

Having fully described my invention what I claim as new and desire tosecure by Letters-Patent, is y, i

1. The combination of a door closer hav-.- ing a stop, a lever arm, adog mountedin said lever armand engaging the stop for seat and normallysupporting the yoke depending below the same,

securedtothe depending end of said screw, a fusible carrier resting onholding thedoor open, a spring one end of which bears on said dog, theother end ofthespring-and straddling a part of the lever arm so as todrop thereon when its support is removed, a tapering seat secured to anddepending from the lever arm, a fusible carrier mounted on said atension screw carried by the lever. arm .and engaging the springintermediate its ends for adjusting thetension of the latter. l

2. The combination of a doorv closer having a stop, a lever arm, a dog;mount'ed in said lever arm and'engaging the stop' for holding the dooropen, a spring one end of which bears on said dog, a bifurcated yokenormally supporting the oher end of said spring, the bifurcated memberof said yoke passing through holes in the lever arm, a tapering seatsecured'to' and depending from the lever arm, a fusible carrier mountedon said seat and forming the normal support for the yoke and a tensionscrew carried by the lever arm and engaging thespring intermediate itsends for adjusting the tension of the spring. a V V 3. Theccmbinationofa door closer ll'ZtV. ing a stop, said lever arm andengaging the stop, a spring one end of which bears on saiddo'gmbifurcated yoke normally supporting the other end of the spring thebifurcated member ofsaid yoke passing through'the lever arm, a screwsecured'tothelever arm and dependmg below the same a taper-lngseatsecured to the depending end of saidsorew, a fusible carrier resting onsaid seat and normally supporting'the yoke, and a tension screw-carriedby the'leve'r arm and en aging the spring intermediatethe'endsof t elatter for adjusting the tension'of the spring.

4. The combination of ing a stop, a lever arm, a dog mounted in saidlever armand engaging the stop, a spring one end of which bears on saiddog, a bifurcated yoke normally supporting the otherendof the spring,thebifurcatedmember of said yokepassing'through the lever arm, a screwsecured to the lever arm and atapermg seat I i the "seat, a ring mountedon said carr er and forming a sup:

tension screw carried by the lever armand engaging the springintermediate the ends a yoke supporting a lever arm, a dog mounted inaldoor closer hav- "and V port for the lower-fend of the yoke and a ofthe latter for-fadj'usting'the tension Of 7 the spring. f I JIntestimony' whereof, I have signed this 7 specificationin the presenceof two subscribing witnesses, ,1

v PEDER MIKKELSEN.

yWlll HGSS GSI 3'1 1 1: JosEPH MoHALE,:

Guns. A. BERRY.

